Use latest Python + Action versions in CI

We also switch to using the 'build' module instead of the 'setup.py'
file.

Signed-off-by: Stephen Finucane <[email protected]>

.github/workflows/pypi.yml

@@ -11,14 +11,14 @@ jobs:
     steps:
       - uses: actions/checkout@v2
 
-      - name: Set up Python 3.8
-        uses: actions/setup-python@v1
+      - name: Set up Python 3.11
+        uses: actions/setup-python@v2
         with:
-          python-version: 3.8
+          python-version: 3.11
 
       - name: Prepare artifacts
         run: |
-          python setup.py sdist
+          python -m build
 
       - name: Publish to PyPI
         env:

.github/workflows/tests.yml

@@ -8,12 +8,12 @@ jobs:
   pre-commit:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v1
+      - uses: actions/checkout@v2
 
-      - name: Set up Python 3.8
-        uses: actions/setup-python@v1
+      - name: Set up Python 3.11
+        uses: actions/setup-python@v2
         with:
-          python-version: 3.8
+          python-version: 3.11
 
       - name: Run pre-commit
         run: |
@@ -31,7 +31,7 @@ jobs:
     - uses: actions/checkout@v2
 
     - name: Set up Python ${{ matrix.python-version }}
-      uses: actions/setup-python@v1
+      uses: actions/setup-python@v2
       with:
         python-version: ${{ matrix.python-version }}
 
@@ -49,10 +49,10 @@ jobs:
     steps:
       - uses: actions/checkout@v2
 
-      - name: Set up Python 3.8
-        uses: actions/setup-python@v1
+      - name: Set up Python 3.11
+        uses: actions/setup-python@v2
         with:
-          python-version: 3.8
+          python-version: 3.11
 
       - name: Run sphinx
         run: |